The 14-nation cartel is meeting to decide on output reductions aimed at boosting oil prices

OPEC is “highly likely” to reach a final agreement to curb oil production later this month, Iran’s oil minister said Saturday, in the latest sign that the cartel is moving closer to resolve its differences.

Iran and Iraq have seemed to be the most reluctant members of the Organization of the Petroleum Exporting Countries to agree on reining production ahead of a Nov. 30 gathering in Vienna. The 14-nation cartel is meeting to decide...